Avedøre 1 primarily used coal as fuel. Avedøre 2 is a multi-fuel system, which utilizes natural gas, oil, straw and wood pellets. Unit 2 consists of a steam turbine system, a gas turbine system and a straw-fired biomass system. The biomass system has a capacity of 45 MW.[2]

As of 2015, unit 1 is being converted from coal to wood pellets at a price of DKK 740 million. It will burn 1.2 million tonnes of wood pellets per year.[3] The new biomass unit is planned to start in the fall of 2016 and operate through 2033.[4] The conversion was completed in December 2016.[5]